S/2019 S 21

Last updated
S/2019 S 21
Discovery 
Discovered by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Brett J. Gladman, E. Ashton
Discovery date2019
Orbital characteristics  
26,439,000  km (16,428,000 mi) [1]
Eccentricity 0.155
-4.480 yrs (1,636.32 d) [1]
Inclination 171.9° (to the ecliptic)
Satellite of Saturn
Group Norse group
Physical characteristics
Mean diameter
4 km
16.2

    S/2019 S 21 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 16, 2023 from observations taken between February 2, 2006 and July 8, 2021. [2]

    S/2019 S 21 is about 4 kilometers in diameter, and orbits Saturn at an average distance of 26.076 Gm in 1,572.06 days, at an inclination of 171.5, orbits in retrograde direction and eccentricity of 0.125. [2] S/2019 S 21 belongs to the Norse group and one of the most distant moons from Saturn along with S/2004 S 26, S/2004 S 52 and S/2020 S 9. [3]

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    S/2020 S 1 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 3, 2023 from observations taken between December 14, 2004 and July 8, 2021.

    S/2019 S 2 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 3, 2023 from observations taken between July 3, 2019 and July 9, 2021.

    S/2020 S 7 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 10, 2023 from observations taken between July 1, 2019 and July 24, 2020.

    S/2019 S 14 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton and Brett J. Gladman on May 10, 2023 from observations taken between July 1, 2019 and July 9, 2021.

    S/2020 S 3 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 5, 2023 from observations taken between July 3, 2019 and July 9, 2021.

    S/2019 S 6 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton and Brett J. Gladman on May 8, 2023 from observations taken between July 3, 2019 and July 8, 2021.

    S/2020 S 4 is the faintest natural satellite of Saturn. It was discovered by Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on June 24, 2020, and was announced on May 6, 2023 by the IAU Minor Planet Center after observations were collected over a long period of time to confirm the satellite's orbit that were taken between July 1, 2019 and July 9, 2021.

    S/2020 S 5 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 6, 2023 from observations taken between July 3, 2019 and July 9, 2021.

    S/2004 S 43 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 7, 2023 from observations taken between December 12, 2004 and July 9, 2021.

    S/2004 S 46 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 8, 2023 from observations taken between December 12, 2004 and July 8, 2021.

    S/2019 S 11 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 8, 2023 from observations taken between January 5, 2005 and August 16, 2020.

    S/2019 S 13 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 9, 2023 from observations taken between July 3, 2019 and July 8, 2021.

    S/2005 S 5 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 10, 2023 from observations taken between March 9, 2005 and July 24, 2020.

    S/2006 S 18 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 15, 2023 from observations taken between December 14, 2004 and July 9, 2021.

    S/2019 S 19 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton and Brett J. Gladman on May 15, 2023 from observations taken between July 3, 2019 and July 8, 2021.

    S/2020 S 9 is a natural satellite of Saturn. Its discovery was announced by Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 15, 2023 from observations taken between August 23, 2019 and August 16, 2020.

    S/2004 S 52 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Edward Ashton, Brett J. Gladman and Mike Alexandersen on May 15, 2023 from observations taken between December 12, 2004 and July 24, 2020.

    References

    1. 1 2 "Planetary Satellite Mean Elements". Jet Propulsion Laboratory. California Institute of Technology. Retrieved 16 May 2023.
    2. 1 2 "MPEC 2023-K05 : S/2019 S 21". Minor Planet Electronic Circular. Minor Planet Center. Retrieved 16 May 2023.
    3. ↑ "S/2019 S 21". Tilmann's Web Site. Tilmann Denk. Retrieved 24 December 2023.
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